Play MP4 files in Windows 10 by right-clicking the file and choosing what application to open it with.

Learn how to use Narrator, a screen-reading app built into Windows, with this complete guide and how-to articles.

Learn how to add an app to run automatically at startup. Select the Start button and scroll to find the app you want to run at startup.

Learn how to reinstall Windows on your PC and how activation works after it's installed.

Découvrez comment installer, réinstaller ou activer Microsoft 365 ou Office 2019 sur un PC ou Mac.

Discusses the release of the Malicious Software Removal Tool (MSRT) to help remove specific prevalent malicious software from Windows-based computers.

了解如何使用产品密钥或数字许可证激活 Windows、检查激活状态，以及链接Microsoft 帐户。

Sharing your notes is easy in OneNote for Windows 10. You can invite others to view a specific page or an entire notebook, and you can select whether notebook participants can only view or fully edit your notes.

Learn how to unlock your Microsoft account and resolve 'account has been locked' error message.

Find out how to use Game Bar to capture game play, chat with friends, track achievements, and more.